射流清管器环状喷嘴流场模拟及优化设计
Flow field simulation and optimal design of bypass jetting pig annular nozzle
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- 引用格式:
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李亚茜,田园,阴丽诗,陈界学,谢晶.射流清管器环状喷嘴流场模拟及优化设计[J].天然气与石油,2023,41(5):78-85.doi:10.3969/j.issn.1006-5539.2023.05.012
LI Yaxi, TIAN Yuan, YIN Lishi, CHEN Jiexue, XIE Jing.Flow field simulation and optimal design of bypass jetting pig annular nozzle[J].Natural Gas and Oil,2023,41(5):78-85.doi:10.3969/j.issn.1006-5539.2023.05.012
- DOI:
- 10.3969/j.issn.1006-5539.2023.05.012
- 作者:
- 李亚茜1 田园2 阴丽诗1 陈界学3 谢晶1
LI Yaxi1, TIAN Yuan2, YIN Lishi1, CHEN Jiexue3, XIE Jing1
- 作者单位:
- 1. 中国石油化工股份有限公司西南油气分公司采气四厂, 重庆 402160; 2. 重庆科技学院石油与天然气工程学院, 重庆 401331; 3. 中国石油西南油气田公司重庆气矿, 重庆 400700
1. No.4 Gas Production Plant, Sinopec Southwest Oil and Gas Branch, Chongqing, 402160, China; 2. College of Petroleum and Natural Gas Engineering, Chongqing University of Science and Technology, Chongqing, 401331, China; 3. PetroChina Southwest Oil & Gas Field Company Chongqing Gas Mine, Chongqing, 400700, China
- 关键词:
- 射流清管器;喷嘴;流场模拟;湍流动能
Bypass jetting pig; Nozzle; Flow field simulation; Turbulent kinetic energy
- 摘要:
为降低天然气管道清管作业风险,射流清管技术被广泛应用于清管作业中。采用环状喷嘴的射流清管器能有效吹扫管道内壁污垢,保障天然气流动安全。针对不同几何尺寸环状喷嘴产生的射流流动特性问题,应用Fluent软件对4种内锥角及3种外锥角的环状喷嘴工作过程进行了数值模拟,从轴向和径向维度选取了多个剖面,得到了不同几何尺寸环状喷嘴射流流场中流速和湍流动能的分布云图及变化曲线。结果表明:环状喷嘴内锥角和外锥角的变化只影响管道内射流吹扫速度、湍流动能大小及管道径向吹扫效果,不影响管道的轴向吹扫范围；以射流流速和湍流动能作为吹扫效果评价指标,则环状喷嘴内锥角为90°、外锥角为80°时能达到最佳管内壁吹扫效果。研究结果可为环状喷嘴结构优化设计提供理论依据。
In order to reduce the risk of natural gas pipeline pigging operation, bypass jetting technology is widely applied in pigging operations. The bypass jetting pig with annular nozzle can effectively clean the dirt on the inner wall of the pipe and provide gas flow assurance. To tackle the problem of jet flow characteristics produced by annular nozzles with different geometric sizes, the annular nozzle working model with four different inner cone angles and three different outer cone angles were numerically simulated by using Fluent software. Multiple sections were selected in the axial and radial dimensions, and the distribution nephogram and changing curves of flow velocity and turbulent kinetic energy in jet flow field of annular nozzles with different geometric sizes were obtained. The results indicate that the change of the inner and outer cone angles of the annular nozzle only affects the purging velocity, turbulent kinetic energy and the radial purging effect of the pipe, but does not affect the axial purging range of the pipe. Taking jet velocity and turbulence kinetic energy as the evaluation indices of the purge effect, the best purge effect of the inner wall of the pipe can be achieved when the inner cone angle of the annular nozzle is 90°and the outer cone angle is 80°. The research results provide a theoretical basis for the optimal design of annular nozzle structure.
